13171689 has 6 divisors (see below), whose sum is σ = 19025786. Its totient is φ = 8781120.

The previous prime is 13171687. The next prime is 13171699. The reversal of 13171689 is 98617131.

It can be written as a sum of positive squares in only one way, i.e., 12131289 + 1040400 = 3483^2 + 1020^2 .

It is not a de Polignac number, because 13171689 - 2¹ = 13171687 is a prime.

It is a super-2 number, since 2×13171689² = 346986782225442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13171681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 731752 + ... + 731769.

Almost surely, 2^13171689 is an apocalyptic number.

It is an amenable number.

13171689 is a deficient number, since it is larger than the sum of its proper divisors (5854097).

13171689 is a wasteful number, since it uses less digits than its factorization.

13171689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463527 (or 1463524 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13171689 is about 3629.2821604279. The cubic root of 13171689 is about 236.1640688573.

The spelling of 13171689 in words is "thirteen million, one hundred seventy-one thousand, six hundred eighty-nine".